How To Fix APPL_MM_IV_MODEL125 - Prepayment Document Posted. Tax Change not allowed.

APPL_MM_IV_MODEL125 - Overview

• Message type: E = Error

• Message class: APPL_MM_IV_MODEL -

• Message number: 125

• Message text: Prepayment Document Posted. Tax Change not allowed.

What causes this issue?

A Prepayment Document was posted for this invoice and taxes were
changed. It his customized, that taxes can no longer be changed when a
prepayment document exists.

System Response

Invoice cannot be saved or posted.

How to fix this error?

Revert your changes and make sure, the taxes do not change. If you need
to change the taxes, delete the invoice and create a new one or change
the customizing "Incoming Invoice --> Prepayment --> Configure Field
Control for Prepayment" and maintain "TAX_TAB" as editable.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message APPL_MM_IV_MODEL125 - Prepayment Document Posted. Tax Change not allowed. ?

  The SAP error message APPL_MM_IV_MODEL125 indicates that a prepayment document has been posted, and a tax change is not allowed for that document. This error typically arises in the context of invoice verification in the Materials Management (MM) module when there is an attempt to change the tax code or tax amount after a prepayment has been made.
  
  Cause:
  
  Prepayment Document Posted: The error occurs because a prepayment has already been posted against the invoice. Once a prepayment is posted, the system locks certain fields, including tax-related fields, to maintain data integrity.
  Tax Code Change: Attempting to change the tax code or tax amount after the prepayment has been posted triggers this error, as the system does not allow modifications that could affect the accounting entries related to the prepayment.
  
  
  Solution:
  
  Review the Prepayment: Check the prepayment document to ensure that it is correctly posted. If there are discrepancies, you may need to reverse the